Add more missing closing namespace comments.

third_party/WebKit/Source/core/css/resolver/MatchedPropertiesCache.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 107 matching lines @@
     void sweep(Timer<MatchedPropertiesCache>*);
 
     unsigned m_additionsSinceLastSweep;
 
     using Cache = HashMap<unsigned, OwnPtr<CachedMatchedProperties>>;
     Timer<MatchedPropertiesCache> m_sweepTimer;
 #endif
     Cache m_cache;
 };
 
-}
+} // namespace blink
 
 #endif